Available in one to six zone models. The Azel i-Link series are designed with flexibility and multi-zone applications in mind. It is so flexible that different models can be interconnected for unlimited zone expansion. In addition, i-Link provides far more functional status than other models on the market today because of their front panel LED indicators that provide the easy system diagnostics demanded by today's installers. Each Azel Switching Relay is designed with a unique power surge protection to ensure continuous control operation and avoid damage and trouble to replace the unit